Narrow-azimuth migration: Analysis and tests in vertically layered media
نویسنده
چکیده
Analysis of common-azimuth migration for vertically layered media shows that downward continuing the data in a narrow strip around the zero crossline offset should yield a kinematically correct migration scheme. I introduce two migration methods that exploit the common-azimuth equations to define an optimal range of crossline-offset wavenumbers and thus to minimize the number of crossline offsets that are necessary to sample adequately the crossline-offset dips. Tests on synthetic data generated assuming a vertically layered medium confirm the theoretical analysis and suggest further testing on data sets with complex velocity functions.
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